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There is not much of standard tests. You can try connecting to different public networks, if you get connection for most of them: your card is fine. Also some cards just are not good, and have serious issues with routers of different brands.

Before trying anything update the driver for your wireless adapter.

There are types of Wireless cards the standard is 802.11:

A 5 Ghz 54Mbps 30m

B 2.4 Ghz 11Mbps 38m

G 2.4 Ghz 54-108 Mbps (MAX 108 MIMO) 100m

N 2.4/5 Ghz 300-600 Mbps (MAX 600 MIMO) 300.

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